Mold-engraving machine



Feb. 25, 1930. c, US'CHMANN 1,748,591

MOLD ENGRAVING MACHINE Filed Aug. 5, 1925 2 Sheets-Sheet 1 INVENTOR.

6021' Uscnnmmr c. USCHMANN MOLD ENGRAVING MACHINE Feb. 25, 1930.

Filed Aug. 5, 1925 2 Sheets-Sheet 2 INVENTOR.

a'unr Usc/Mln/A ATTO RNEY;

i Patented Feb. 25,1930

- UNITED STATES COMPANY, or AKRON, oHIo,T fconronerrononaonro f I monn nnennvmeMAcHrnEf '1 Application filed August 5; 1925. Serial 5 Not48g268. r

This invention relates to mold engraving machines such as are used for cutting tread designs in annular tire molds.

The chief object of the invention is to provide means for operating the tool of said machines toward or from the work, the means to be controllable by the operator at a point conveniently near the work-controlling and tool-controlling instrumentalities customarily employed in engraving machines by which the tool is made to copy a designor pattern in a pattern plate or template, whereby the 1,-machineis more conveniently and easily operated with a minimum of effort and at greatly lowered cost.

The foregoing and other objects are ob- ,tained by the construction illustrated in the accompanying drawing and described below.

. Figure 1 is a side elevation of a 7 bodying the invention; p

, Figure 2. is an enlarged side elevation ofthe tool-operating mechanismembodying the invention;

It is to be understood that the invention is j of which is shown and described. I

not limited to the specific embodiment there- Of the accompanying drawings: 7

g 7 device em- Figure' 3 is a plan vlew thereof partly in 3 section; and

supporting table having rotatably mounted- Figure 4 is a section on line 44 of Fig- Referringtolthedrawings, 10 is a suitable thereon a turret 11 provided with chuck members 12, 12so as removably to receive and secure in place a-tiremold section 13. Turretlll has a ring gear 14 thereonby which it is adapted to be'indexedby asuitable means illustrated generally at.,15 and also adapted to be rotated through limited-angles by an arm 16 provided on. a member 17 journaled on table 10 for concentric rotation with turret 11 and adaptedto bereleasably connected thereto by any suitable device illustrated generally at 18. I

Arm 16 carries a pattern plate 19 having cut therein the design to be engraved in mold section 13 and in which .designengages a table and tool controlling pin or follower 20. To move table 11 to effect circumferential cuts the :16, i has thereon 2a; 21

with which' js mesheda gear 22 adapted to berotated by a hand lever- 23. 1,;

' Pin20issecured1to a'slide'240pe'rableby a screw 25 by mea'ns of a hand wheel 26and a sector gear 28 for singularly-swinging.a tool a 5 adapted to reciprocate a rack-27 engaged;w1th

head 29- pivoted at ;30'and having: a rotary cutting tool ,31 therein. Tool 31. is adapted to be rotated by a shaft .31 keyed or splined so as to be shiftablethroughabevel gear .32 meshed-with a bevel. gear '33; driven by means of ;a,-fioating shaft 34 adaptedto be jrotated-in any position by means of a pulley- .35 driven by a belt 3,6Idriven Iby amotor 37 Themachineas briefly'outlined above is a 1 ;lniovvnjtype of mold engraving. machine and faccordingly afde'taile'd description-thereof is unnecessary, The -meansfor' operatin tool 31; -in' head 29 toward and from mol ,seca

scribed.

Arrangejdf'in head sleeve; ing ithru'st bearings39, 39 and in which tool- 5 connected thereto -sleeve 40' beingiormed dwithfr-ack teeth at41 with which ji's rmes hed It is. desirable forYthe reason to be ex- .plained to provide means it'oroperating pin ion42 from a remote point. Accordingly,on V

sleev i e of pinion 42 is arrangedavlever 44 having a clutch element 45 thereon ar ranged to clutch an element 46 fixed on sleeve 42*", members 45 and 46 being held in engagement by means of a nut 47 and washer 48 whereby the relative position of lever '44 I on sleeve 42 may be readily varied.

' Lever 44 has connected thereto a piston rod 49 having thereon a piston 50 operable 'in a double-acting cylinder 51 s'wiveled at '52 on head 29. Connected with opposite ends of cylinder 51are flexible conductors 53 and 54 connected respectively toair-supply pipes 117.0 i .n 3- a by w h th I e re rb'ect of I the invention is obtainedxwill now e de-' and 56 to which the admission or release of air under pressure is controlled by a suitable valve 57 operable by means of a lever 57 a for controlling an air inlet 58. Valve 57, as it will be seen; is mounted on the machine adjacent hand+wheel 26- and=lever 23 so as to bereadily operable by a rnaohinaoperative at his normal working station.

a. v.In order to accurately determine 7. the desired depth of cut, .memberae'has fixed thereon an arm 59'arran'ged to engage an adjustable stop 60 provided with a suitable microin- 1 eter adjusting means of any known type, such construction havingheretofore'been employed for the purpose described.

' 1 It will appear from the foregoing that during the designcu-tting operations, in order to operate thetoolinto or away from the workfthe operative neednot move irom his station. "By operating valve 57 the tool'can be moved? either toward or from the 7 work inany-position'of head 29.

Modifi'cations of the inventionmay be re- 7 sorted to without departing from-the spirit thereof or -the scopeof the appended claims; "Whatis claimed is:

1; In a mold-engravingmachine,in combio nation, a zwork operating means,- a tool-oper- "ating means,--a pattern for controlling both of said means; 'sa'id means being arranged to be simultaneously manually-operated by a sing-1eoperative to copy said pattern in said work, andi neans for moving the'tooltoward or froin thework-along its own axis,* said n1eans being adapted to be controlled from adjacent the-:norrnal station ---of" s aid; operv ative at 'sa id machine assumed -when operating said work and tool.

" 2.- -In a inold -'engraying mach;ine, a mold "supporting t-ur'ret, F tool movable radially of the turretandalso towardand {from the same along its -*own=ax-is a pattern plate connected to the turret; a patternplate -follower connected toithe tool, means for "rotating the turret toiefiectrelatively circumferen *tial movement ofthe patternplate tothe follo-wer, means 'adjacent the first means for moving the tool and effecting relatively radial movement as the follower-tothe pattern plate, and*mean's adjacent the first and second rmeans for -moving-the tool toward or from the work along its own axis whereby all of 'saidme ans are controllable'by an oper- "ativeat 'asinglestation. 55 v i v TGURT U-SGHMANN. 

